6a43807843
Motivation: We should update our code to use lamdas whenever possible Modifications: Use lambdas when possible Result: Cleanup code for Java8
257 lines
9.2 KiB
Java
257 lines
9.2 KiB
Java
/*
|
|
* Copyright 2015 The Netty Project
|
|
*
|
|
* The Netty Project licenses this file to you under the Apache License,
|
|
* version 2.0 (the "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
package io.netty.util.concurrent;
|
|
|
|
import org.hamcrest.CoreMatchers;
|
|
import org.junit.Assert;
|
|
import org.junit.Test;
|
|
|
|
import java.util.Collections;
|
|
import java.util.Queue;
|
|
import java.util.Set;
|
|
import java.util.concurrent.Callable;
|
|
import java.util.concurrent.CompletionException;
|
|
import java.util.concurrent.Executor;
|
|
import java.util.concurrent.ExecutorService;
|
|
import java.util.concurrent.Executors;
|
|
import java.util.concurrent.LinkedBlockingQueue;
|
|
import java.util.concurrent.RejectedExecutionException;
|
|
import java.util.concurrent.TimeUnit;
|
|
import java.util.concurrent.atomic.AtomicInteger;
|
|
import java.util.concurrent.atomic.AtomicReference;
|
|
|
|
public class SingleThreadEventExecutorTest {
|
|
|
|
@Test
|
|
public void testWrappedExecutorIsShutdown() {
|
|
ExecutorService executorService = Executors.newSingleThreadExecutor();
|
|
|
|
SingleThreadEventExecutor executor = new SingleThreadEventExecutor(executorService) {
|
|
@Override
|
|
protected void run() {
|
|
while (!confirmShutdown()) {
|
|
Runnable task = takeTask();
|
|
if (task != null) {
|
|
task.run();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
executorService.shutdownNow();
|
|
executeShouldFail(executor);
|
|
executeShouldFail(executor);
|
|
try {
|
|
executor.shutdownGracefully().syncUninterruptibly();
|
|
Assert.fail();
|
|
} catch (CompletionException expected) {
|
|
// expected
|
|
Assert.assertThat(expected.getCause(), CoreMatchers.instanceOf(RejectedExecutionException.class));
|
|
}
|
|
Assert.assertTrue(executor.isShutdown());
|
|
}
|
|
|
|
private static void executeShouldFail(Executor executor) {
|
|
try {
|
|
executor.execute(() -> {
|
|
// Noop.
|
|
});
|
|
Assert.fail();
|
|
} catch (RejectedExecutionException expected) {
|
|
// expected
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testThreadProperties() {
|
|
final AtomicReference<Thread> threadRef = new AtomicReference<Thread>();
|
|
SingleThreadEventExecutor executor = new SingleThreadEventExecutor(new DefaultThreadFactory("test")) {
|
|
@Override
|
|
protected void run() {
|
|
threadRef.set(Thread.currentThread());
|
|
while (!confirmShutdown()) {
|
|
Runnable task = takeTask();
|
|
if (task != null) {
|
|
task.run();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
ThreadProperties threadProperties = executor.threadProperties();
|
|
|
|
Thread thread = threadRef.get();
|
|
Assert.assertEquals(thread.getId(), threadProperties.id());
|
|
Assert.assertEquals(thread.getName(), threadProperties.name());
|
|
Assert.assertEquals(thread.getPriority(), threadProperties.priority());
|
|
Assert.assertEquals(thread.isAlive(), threadProperties.isAlive());
|
|
Assert.assertEquals(thread.isDaemon(), threadProperties.isDaemon());
|
|
Assert.assertTrue(threadProperties.stackTrace().length > 0);
|
|
executor.shutdownGracefully();
|
|
}
|
|
|
|
@Test(expected = RejectedExecutionException.class, timeout = 3000)
|
|
public void testInvokeAnyInEventLoop() throws Throwable {
|
|
try {
|
|
testInvokeInEventLoop(true, false);
|
|
} catch (CompletionException e) {
|
|
throw e.getCause();
|
|
}
|
|
}
|
|
|
|
@Test(expected = RejectedExecutionException.class, timeout = 3000)
|
|
public void testInvokeAnyInEventLoopWithTimeout() throws Throwable {
|
|
try {
|
|
testInvokeInEventLoop(true, true);
|
|
} catch (CompletionException e) {
|
|
throw e.getCause();
|
|
}
|
|
}
|
|
|
|
@Test(expected = RejectedExecutionException.class, timeout = 3000)
|
|
public void testInvokeAllInEventLoop() throws Throwable {
|
|
try {
|
|
testInvokeInEventLoop(false, false);
|
|
} catch (CompletionException e) {
|
|
throw e.getCause();
|
|
}
|
|
}
|
|
|
|
@Test(expected = RejectedExecutionException.class, timeout = 3000)
|
|
public void testInvokeAllInEventLoopWithTimeout() throws Throwable {
|
|
try {
|
|
testInvokeInEventLoop(false, true);
|
|
} catch (CompletionException e) {
|
|
throw e.getCause();
|
|
}
|
|
}
|
|
|
|
private static void testInvokeInEventLoop(final boolean any, final boolean timeout) {
|
|
final SingleThreadEventExecutor executor = new SingleThreadEventExecutor(Executors.defaultThreadFactory()) {
|
|
@Override
|
|
protected void run() {
|
|
while (!confirmShutdown()) {
|
|
Runnable task = takeTask();
|
|
if (task != null) {
|
|
task.run();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
try {
|
|
final Promise<Void> promise = executor.newPromise();
|
|
executor.execute(() -> {
|
|
try {
|
|
Set<Callable<Boolean>> set = Collections.singleton(() -> {
|
|
promise.setFailure(new AssertionError("Should never execute the Callable"));
|
|
return Boolean.TRUE;
|
|
});
|
|
if (any) {
|
|
if (timeout) {
|
|
executor.invokeAny(set, 10, TimeUnit.SECONDS);
|
|
} else {
|
|
executor.invokeAny(set);
|
|
}
|
|
} else {
|
|
if (timeout) {
|
|
executor.invokeAll(set, 10, TimeUnit.SECONDS);
|
|
} else {
|
|
executor.invokeAll(set);
|
|
}
|
|
}
|
|
promise.setFailure(new AssertionError("Should never reach here"));
|
|
} catch (Throwable cause) {
|
|
promise.setFailure(cause);
|
|
}
|
|
});
|
|
promise.syncUninterruptibly();
|
|
} finally {
|
|
executor.shutdownGracefully(0, 0, TimeUnit.MILLISECONDS);
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testTaskAddedAfterShutdownNotAbandoned() throws Exception {
|
|
|
|
// A queue that doesn't support remove, so tasks once added cannot be rejected anymore
|
|
LinkedBlockingQueue<Runnable> taskQueue = new LinkedBlockingQueue<Runnable>() {
|
|
@Override
|
|
public boolean remove(Object o) {
|
|
throw new UnsupportedOperationException();
|
|
}
|
|
};
|
|
|
|
final Runnable dummyTask = () -> {
|
|
};
|
|
|
|
final LinkedBlockingQueue<Future<?>> submittedTasks = new LinkedBlockingQueue<Future<?>>();
|
|
final AtomicInteger attempts = new AtomicInteger();
|
|
final AtomicInteger rejects = new AtomicInteger();
|
|
|
|
ExecutorService executorService = Executors.newSingleThreadExecutor();
|
|
final SingleThreadEventExecutor executor = new SingleThreadEventExecutor(executorService, Integer.MAX_VALUE,
|
|
RejectedExecutionHandlers.reject()) {
|
|
|
|
@Override
|
|
protected Queue<Runnable> newTaskQueue(int maxPendingTasks) {
|
|
return taskQueue;
|
|
}
|
|
|
|
@Override
|
|
protected void run() {
|
|
while (!confirmShutdown()) {
|
|
Runnable task = takeTask();
|
|
if (task != null) {
|
|
task.run();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected boolean confirmShutdown0() {
|
|
boolean result = super.confirmShutdown0();
|
|
// After shutdown is confirmed, scheduled one more task and record it
|
|
if (result) {
|
|
attempts.incrementAndGet();
|
|
try {
|
|
submittedTasks.add(submit(dummyTask));
|
|
} catch (RejectedExecutionException e) {
|
|
// ignore, tasks are either accepted or rejected
|
|
rejects.incrementAndGet();
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
};
|
|
|
|
// Start the loop
|
|
executor.submit(dummyTask).sync();
|
|
|
|
// Shutdown without any quiet period
|
|
executor.shutdownGracefully(0, 100, TimeUnit.MILLISECONDS).sync();
|
|
|
|
// Ensure there are no user-tasks left.
|
|
Assert.assertEquals(0, executor.drainTasks());
|
|
|
|
// Verify that queue is empty and all attempts either succeeded or were rejected
|
|
Assert.assertTrue(taskQueue.isEmpty());
|
|
Assert.assertTrue(attempts.get() > 0);
|
|
Assert.assertEquals(attempts.get(), submittedTasks.size() + rejects.get());
|
|
for (Future<?> f : submittedTasks) {
|
|
Assert.assertTrue(f.isSuccess());
|
|
}
|
|
}
|
|
}
|